/*
 * Copyright 2010 Yannick Stucki (yannickstucki.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.yannickstucki.android.musicqueue.data;

/**
 * A class that can perform a query and then can be used as a cursor.
 * 
 * @author y
 * 
 */
public interface ISongCursor {

  /**
   * Performs the query, moves the cursor the first position and returns whether
   * there are any results or not.
   */
  boolean query();

  /**
   * Moves the cursor to the next position and returns whether there's still a
   * song at that position.
   */
  boolean moveToNext();

  /**
   * Returns the song at the current position.
   */
  Song getSong();
}
